Robocopy move contents of a system drive to a backup drive

How to use robocopy to move the contents of an old system drive to a backup drive.

C:\ drive is the main system drive running Windows 7 with robocopy.

D:\ is a large, internal drive for backups.

F:\ drive is a system boot drive with an old installation of Windows XP.

This robocopy command example will move all the files from F:\ to a sub-folder on the D:\ drive.
Note, the file move is permanent and you will not be able to boot off the old system drive anymore.
The backup will be good enough only to preserve a copy of the files.